When transporting your batteries around you need to be sure they've been capped. Failing to cap your batteries can result in them venting out Potassium Hydroxide if they come into contact with keys, coins or other metal objects in your pocket. Even worse this could possibly lead to sparks and possible fires.
Secure yourself and your batteries with these 2 PVC caps which both feature the Magic-Flight glyph. For the Magic Flight launch box
This information is sourced from the manufacturer and our own experience testing the product.